Electrically-controlled door lock for cars



R. H. PARSONS.

ELECTRICALLY CONTROLLED DOOR LOCK FOR CARS.

APPLICATION FILED APR. 4, 1919.

Patented Feb. 7,1922.

UNITED STATES,

RAYMOND n. PARSONS, or EW YoBx, N.. Y., ASSIGNOR 'ro mmanrafmmm COMPANY,on NEW you, n; 'Y., A CORPORATION or WEST .vmerm'a.

ELECTRICALLY-CONTROLLED noon LOCK ron'cim's.

is a specification.

- invention,

- cuit employed in accordance with myinven throughout the several'views.

This invention relates to electrically controlled door locks for doorsemployed on "street cars, interurban"cars,"subway or eleparticularly tosuch cars or trains vated trains, railway trains, or the like,'and which'are electrically operated.

. The object of the'invention i's to provide an electrically controlleddoor lock. which is simple in construction, efficient in operation,

and economical of manufacture, and readily assembled, and which requireslittle or no attention in upkeep. v Q

"A further object of the invention is to provide' an electricallycontrolled lock for doors which will effectively 'lock the door againstaccidental ordeliberate opening while the car-is'inmotion.

"Other objects of theinvention will appear more fully hereinafter.

The invention consists substantially in the construction, combination,location and relative arrangement of parts, all aswill'be more fullyhereinafter set' forth as shown by'the accompanying drawing and finallypointed are well known'in-the art and are the stand- "ard' type of doorsemployed, and for the ,purpose of illustratingmy invention I-ihaveapplied the principles thereof to a"r tating member which may be theactuatingshaft out in the appended claims.

Referring to'the drawing f Fig. 1 is a top plan view of a door lockmechanism employed in accordance with my "Fig. 2 is a its unlockedposition.

similar view showing same in same with the parts in th'e positionshown'in Fi 1. V

%ig. 4 is a sectional view takenon the'line' 4, 4:, Fig. 3, looking in'the direction of the arrows. y

5 is a diagrammatic vIew of the'c'lrtion. I

The same part 7 reference character wherever In accordance with myinvention fI 'propose to provide a door lock for street' cars, or-

7 other cars which are electrically dri'ven,iand

tofutilize the currentsupplied to the motor I Specification of Letters Patent.

. dental or otherwise.

' inoperative when the car is standing 'still.

is designated by. the 'same' .it occurs.

Patented Feb. 7, [1922.

Application filed A ril 4(1919; 'seriaiiwo. 287,385.

" of the car when th'e same is beingipropelled.

to lock the door against movement, acci- I further propose to utillzethe established principle that when the-car is coasting, or is movingdue to its momentum, the driving motor being geared to'the wheels andcontinuing therefore to rotate, actsas a generator of current, andIutilize the current thus generated when the car iscoastin or movingun'der "its own momentum to ikewiselock the door in "its closed positionso that 1. thereby obtain a permanent electrically operatedlockfor thedoor which can only be unlocked or rendered It is known to employpneumatic *motors for operatin doors and to. provide means forelectrical Y controlling the control valve of the pneumatic motorswhenithe car is in motionto prevent the actuation of the motor to openthe door. A'great many of the cars "at present in use, however, are ofthe manually operated type,and -it is-principally to the manuallyvoperated doors of electrically driven cars that my present inventionisdirected, andin accerdancetherewith when the car is in motion 'Ilpreventim'annal of the door or it maybe any shaft in the door operatingmechanism which upon rotation effects the opening of the door. fThis'shaft I haveindicated atzl,.and suitably located at the end thereof torotate therewith I provide a disk*2 with anotch. or jog '3 outthereinaszshown. In practice I' refer-to havethe shaft 1 pass through .ap ate or support "4 which is mounted 'atthe l'tOp of the-door to be outofftheway, unseen,

and less 'aptto "become accidentally or otherwise deranged. Pivotallymounted on the heldon apin 8'carried by the plate 45in any'suitablemanner, for example, by'means of a cotter'pin. The "end 630f dog '5: is

adapted to 'fit into the jog 31 0f therota able-ilo 7 disk 2. A spring 9is fastened to a pin .on the plate 4 and a pin 11 on the leg 7 of thedog to normally tend to project the leg 6 of the dog 5 into the jog" 3of the disk 2. Also mounted on theplate 4 is a suitable magnet 13 whichmay be of any desired type or construction, or as 1llus- "trated,'thearmature of which is a plate 14" A spring 21 is interposed between'theframe 16 and the armature 14. From the foregoing 'construction it willbe seen that the arm 19 is moved about'its pivot upon actuation of thearmature 14 but that its movement is slightly in advance of thearmature-14 when the armature is attracted towards the magnetand isslightly behind the movement of .the armature 14 when the magnet isdeenergized due to the pin and slot connection between the armature 14and the arm 19 secured by means of the pin 17 and the yoke 18. The endof the arm 19 has secured thereto a block 20, which, when the magnet isenergized, and as shown in Fig. 1, becomes positioned between the end ofthe leg'7 of the dog 5 and a stationary block 21 secured to the plate 4.

The operation of the device thus far described will be apparent. If themagnet 13 is energized the. armature 14 and conseuently the. arm 19 isdrawn into the position shown in Fig. 1 and thereupon counterclockwiserotation of the shaft 1 as indicated ;by the arrow is prevented becausethe end of the jog 3' bears against the leg 6 of dog 5 and the leg 7 ofdog5 bears against the movable lock block 20 and'the fixed stop .block21", thereby preventing the rotation of the'shaft 1. As soon, however,as the magnet is deenergized the shaft 1 is rotated counterclockwiseasindicated by the arrowin Fig.

2.- The jog 3 in the disk 2 causes the dog 5 to-be rotated about itspivot 8 against the action'of the spring 9 for the block 20 "of thearm-19 has been drawnout of the 'path'of the end of the leg 7 of the dog5.

' In the present equipment of-street cars the counter E. M. F]?principle of the motor acting as a generator when the car is .mov1ng"dueto its own momentum has been "utilized extensively incoasting recordersor timeire'corders in the manner shown and de- :scribed in LettersPatent to Messrs. Hall -'and Hall,*No. 1,201,041, datedOctober 10,

. 1916, and'in Letters Patent to Messrs. Wade &Chappe1le, No. 1,275,328,dated August 13,1918, and it is therefore the present practice to employa circuit arrangement z som'ewhat'similar tothat shown in Fig. 5,.wherein current is supplied from the third 1: J

raihtrolley wire or thelike, to line 30 where i current also to saiddevice it passes through solenoid 31 to the car motor by a conductor 32(not shown). Thus if currentlis being utilized by the motor to propelthe car the solenoid 31 raises its plunger. 33 to establish circuitconnection between contacts 34 and 35, one of which contacts, namely 34,is connected. to the source throughwire 30, and the other of whichcontacts is connected to the magnet 13. Thus it will be seen that whenthe car is being propelled by electricpower the magnet 13 is energizedto lock the door against opening. Likewise, when =thecurrent is notbeing supplied from line .30, and consequently the. solenoid 31 isdeenergized, the plunger establishes circuit connection betweencontacts36 and 37 so that the motor 38 being rotated generates current which issupplied through contacts 36,37, to the magnet 13, thus preventing thedoor from being opened when the car is in motion and being propelledfrom the electric' source. In both of the foregoing instances the magnet13 isconnected to ground in any suitable manner to establish. thecomplete circuit.

Many modifications and changes in detail will readily occur to thoseskilled in the art without departing from the spirit and scope of myinvention as defined .in'the claims, but having now set forth the objectand nature of my invention and'having shownand described a structureand'arrangement. embodying the principles thereof, what I claim as newand useful and of my own invention'fand desire to secure byLettersPatent is, 1. In a locking device for doors of electrically driven cars,the combination with an actuating member to 'be moved, an electricallyactuated locking device, means for supplying current to said device fromthe main current supply when'the car is ele'ctrically propelled andmeans for supplying from a generator. 110

"spring controlled means for engaging said notched disk, electricallyactuated means ineluding a block member for engaging said springcontrolled.ameans to form a locking device," and means for supplyingcurrent to said electrically actuated means when -12 the car is coastingunder its own momentum.

. 3. In a locking device for doors of electrically driven cars, thecombination with a rotatable shaft and lock mechanism, including a lockdog and stop blocks, forlocking. said shaft against rotation when thecar is inmotionfl x 4. In an electrically operated-lock mechanismfordoors ofelectrically operated cars, a solenoid, Janotched lock disk,a spring .130

pressed pivotally mounted lock-member normally engaging said notchedlock disk and means for engaging said lock member against movement whenthe solenoid is energized.

5. In a locking device for doors of electrically driven cars, thecombination with a rotatable shaft, a disk carried by said shaft, andprovided with a jog therein, a dog normally adapted to lie in said jogand to be rotated upon rotation of said shaft, means adapted to preventrotation of said dog, and electrically controlled means for locking saiddog against rotation. v

6. In a locking device for doors of electrically driven cars, thecombination with a rotatable shaft, a disk carried by said shaft, andprovided with a jog therein, a dog normally adapted to lie in said jogand to be rotated upon rotation of said shaft, means capable of movinginto the path of said dog, and electrically controlled means for lockingsaid dog against rotation, and means for actuating said electricallycontrolled means when the car is in motion.

7. Ina locking device for doors of electrically driven cars, thecombination with a rotatable shaft, a disk carried by said shaft, andprovided with a jog therein, a dog normally adapted to lie in said jogand to be rotated upon rotation of said shaft, an obstruction blockadapted to be positioned in the path of said dog to prevent the rotationthereof, a magnet for drawing said block into position to obstruct saiddog, and means for normally withdrawing and retaining said block out ofthe path of said dog when the magnet is not energized.

8. In a locking device for doors of electrically driven cars, thecombination with a rotatable shaft, a disk carried by said shaft, andprovided with a jog therein, a dog normally adapted to lie in said jogand to be rotated upon rotation of said shaft, an obstruction blockadapted to be positioned in the path of said dog to prevent the rotationthereof, a magnet for drawing said block into position to obstruct saiddog, and means for normally withdrawing and retaining said block out ofthe path of said dog when the magnet is not energized, and means forenergizing said magnet when the car is in motion.

In testimony whereof I have hereunto set my hand on this 1st day ofApril, A. D. 1919. V

RAYMOND H. PARSONS.

